I bought one to compare it to the Surefire Nitrolon. The brightness is the same, but the price is cheaper and the Blackhawk has a tail cap with momentary on or constant on which the Surefire doesn't. I have since bought another one which I use these as weapon lights, and with the GG&G one inch mounting rings these work great. The GG&G ring actually fits the Blackhawk better than the Nitrolon. The only slight down fall is the bulb isn't LED so you only get one hour constant use, but that is standard for all incandescent bulbs. Best deal for the money I have found.
Pros: Brightness, tailcap switch
Cons: N/A
This review was written in the old system and had content requirements that are different than reviews written today.